Tongbaite is a rare mineral that has the chemical formula Cr₃C₂, or

chromium carbide Chromium(II) carbide is a ceramic compound that exists in several chemical compositions: Cr3C2, Cr7C3, and Cr23C6. At standard conditions it exists as a gray solid. It is extremely hard and corrosion resistant. It is also a refractory compound ...

. It was first described in 1983 for an occurrence in Liu village,

Tongbai County Tongbai County () is a county in the south of Henan province, China, bordering Hubei province to the south. The easternmost county-level division of the prefecture-level city of Nanyang, it has an area of and a population of 420,000. Administrati ...

(桐柏县),

Henan Province Henan; alternatively Honan is a province in Central China. Henan is home to many heritage sites, including Yinxu, the ruins of the final capital of the Shang dynasty () and the Shaolin Temple. Four of the historical capitals of China, Luo ...

China China, officially the People's Republic of China (PRC), is a country in East Asia. With population of China, a population exceeding 1.4 billion, it is the list of countries by population (United Nations), second-most populous country after ...

and named for the locality. It occurs in an

ultramafic Ultramafic rocks (also referred to as ultrabasic rocks, although the terms are not wholly equivalent) are igneous and meta-igneous rocks with a very low silica content (less than 45%), generally >18% MgO, high FeO, low potassium, and are usua ...

rock deposit. It has also been found in the

Tibet Autonomous Region The Tibet Autonomous Region (TAR), often shortened to Tibet in English or Xizang in Pinyin, Hanyu Pinyin, is an Autonomous regions of China, autonomous region of the China, People's Republic of China. It was established in 1965 to replace the ...

and the Isovsky District, in the

Urals The Ural Mountains ( ),; , ; , or simply the Urals, are a mountain range in Eurasia that runs north–south mostly through Russia, from the coast of the Arctic Ocean to the river Ural (river), Ural and northwestern Kazakhstan.

of Russia.

References

Carbide minerals Chromium minerals Orthorhombic minerals Minerals in space group 62 Minerals described in 1983 {{Mineral-stub